663 строки
20 KiB
ArmAsm
663 строки
20 KiB
ArmAsm
/*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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* Copyright (C) 2008 Jim Law - Iris LP All rights reserved.
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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* Written by Jim Law <jlaw@irispower.com>
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*
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* intended to replace:
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* memcpy in memcpy.c and
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* memmove in memmove.c
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* ... in arch/microblaze/lib
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*
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*
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* assly_fastcopy.S
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*
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* Attempt at quicker memcpy and memmove for MicroBlaze
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* Input : Operand1 in Reg r5 - destination address
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* Operand2 in Reg r6 - source address
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* Operand3 in Reg r7 - number of bytes to transfer
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* Output: Result in Reg r3 - starting destinaition address
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*
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*
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* Explanation:
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* Perform (possibly unaligned) copy of a block of memory
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* between mem locations with size of xfer spec'd in bytes
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*/
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#include <linux/linkage.h>
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.globl memcpy
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.ent memcpy
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memcpy:
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fast_memcpy_ascending:
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/* move d to return register as value of function */
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addi r3, r5, 0
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addi r4, r0, 4 /* n = 4 */
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cmpu r4, r4, r7 /* n = c - n (unsigned) */
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blti r4, a_xfer_end /* if n < 0, less than one word to transfer */
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/* transfer first 0~3 bytes to get aligned dest address */
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andi r4, r5, 3 /* n = d & 3 */
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/* if zero, destination already aligned */
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beqi r4, a_dalign_done
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/* n = 4 - n (yields 3, 2, 1 transfers for 1, 2, 3 addr offset) */
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rsubi r4, r4, 4
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rsub r7, r4, r7 /* c = c - n adjust c */
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a_xfer_first_loop:
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/* if no bytes left to transfer, transfer the bulk */
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beqi r4, a_dalign_done
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lbui r11, r6, 0 /* h = *s */
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sbi r11, r5, 0 /* *d = h */
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addi r6, r6, 1 /* s++ */
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addi r5, r5, 1 /* d++ */
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brid a_xfer_first_loop /* loop */
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addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
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a_dalign_done:
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addi r4, r0, 32 /* n = 32 */
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cmpu r4, r4, r7 /* n = c - n (unsigned) */
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/* if n < 0, less than one block to transfer */
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blti r4, a_block_done
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a_block_xfer:
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andi r4, r7, 0xffffffe0 /* n = c & ~31 */
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rsub r7, r4, r7 /* c = c - n */
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andi r9, r6, 3 /* t1 = s & 3 */
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/* if temp != 0, unaligned transfers needed */
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bnei r9, a_block_unaligned
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a_block_aligned:
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lwi r9, r6, 0 /* t1 = *(s + 0) */
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lwi r10, r6, 4 /* t2 = *(s + 4) */
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lwi r11, r6, 8 /* t3 = *(s + 8) */
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lwi r12, r6, 12 /* t4 = *(s + 12) */
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swi r9, r5, 0 /* *(d + 0) = t1 */
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swi r10, r5, 4 /* *(d + 4) = t2 */
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swi r11, r5, 8 /* *(d + 8) = t3 */
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swi r12, r5, 12 /* *(d + 12) = t4 */
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lwi r9, r6, 16 /* t1 = *(s + 16) */
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lwi r10, r6, 20 /* t2 = *(s + 20) */
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lwi r11, r6, 24 /* t3 = *(s + 24) */
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lwi r12, r6, 28 /* t4 = *(s + 28) */
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swi r9, r5, 16 /* *(d + 16) = t1 */
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swi r10, r5, 20 /* *(d + 20) = t2 */
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swi r11, r5, 24 /* *(d + 24) = t3 */
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swi r12, r5, 28 /* *(d + 28) = t4 */
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addi r6, r6, 32 /* s = s + 32 */
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addi r4, r4, -32 /* n = n - 32 */
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bneid r4, a_block_aligned /* while (n) loop */
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addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
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bri a_block_done
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a_block_unaligned:
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andi r8, r6, 0xfffffffc /* as = s & ~3 */
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add r6, r6, r4 /* s = s + n */
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lwi r11, r8, 0 /* h = *(as + 0) */
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addi r9, r9, -1
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beqi r9, a_block_u1 /* t1 was 1 => 1 byte offset */
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addi r9, r9, -1
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beqi r9, a_block_u2 /* t1 was 2 => 2 byte offset */
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a_block_u3:
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bslli r11, r11, 24 /* h = h << 24 */
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a_bu3_loop:
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lwi r12, r8, 4 /* v = *(as + 4) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 0 /* *(d + 0) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 8 /* v = *(as + 8) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 4 /* *(d + 4) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 12 /* v = *(as + 12) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 8 /* *(d + 8) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 16 /* v = *(as + 16) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 12 /* *(d + 12) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 20 /* v = *(as + 20) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 16 /* *(d + 16) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 24 /* v = *(as + 24) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 20 /* *(d + 20) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 28 /* v = *(as + 28) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 24 /* *(d + 24) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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lwi r12, r8, 32 /* v = *(as + 32) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 28 /* *(d + 28) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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addi r8, r8, 32 /* as = as + 32 */
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addi r4, r4, -32 /* n = n - 32 */
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bneid r4, a_bu3_loop /* while (n) loop */
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addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
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bri a_block_done
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a_block_u1:
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bslli r11, r11, 8 /* h = h << 8 */
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a_bu1_loop:
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lwi r12, r8, 4 /* v = *(as + 4) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 0 /* *(d + 0) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 8 /* v = *(as + 8) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 4 /* *(d + 4) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 12 /* v = *(as + 12) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 8 /* *(d + 8) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 16 /* v = *(as + 16) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 12 /* *(d + 12) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 20 /* v = *(as + 20) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 16 /* *(d + 16) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 24 /* v = *(as + 24) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 20 /* *(d + 20) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 28 /* v = *(as + 28) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 24 /* *(d + 24) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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lwi r12, r8, 32 /* v = *(as + 32) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 28 /* *(d + 28) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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addi r8, r8, 32 /* as = as + 32 */
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addi r4, r4, -32 /* n = n - 32 */
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bneid r4, a_bu1_loop /* while (n) loop */
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addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
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bri a_block_done
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a_block_u2:
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bslli r11, r11, 16 /* h = h << 16 */
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a_bu2_loop:
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lwi r12, r8, 4 /* v = *(as + 4) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 0 /* *(d + 0) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 8 /* v = *(as + 8) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 4 /* *(d + 4) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 12 /* v = *(as + 12) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 8 /* *(d + 8) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 16 /* v = *(as + 16) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 12 /* *(d + 12) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 20 /* v = *(as + 20) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 16 /* *(d + 16) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 24 /* v = *(as + 24) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 20 /* *(d + 20) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 28 /* v = *(as + 28) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 24 /* *(d + 24) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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lwi r12, r8, 32 /* v = *(as + 32) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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swi r9, r5, 28 /* *(d + 28) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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addi r8, r8, 32 /* as = as + 32 */
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addi r4, r4, -32 /* n = n - 32 */
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bneid r4, a_bu2_loop /* while (n) loop */
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addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
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a_block_done:
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addi r4, r0, 4 /* n = 4 */
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cmpu r4, r4, r7 /* n = c - n (unsigned) */
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blti r4, a_xfer_end /* if n < 0, less than one word to transfer */
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a_word_xfer:
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andi r4, r7, 0xfffffffc /* n = c & ~3 */
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addi r10, r0, 0 /* offset = 0 */
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andi r9, r6, 3 /* t1 = s & 3 */
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/* if temp != 0, unaligned transfers needed */
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bnei r9, a_word_unaligned
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a_word_aligned:
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lw r9, r6, r10 /* t1 = *(s+offset) */
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sw r9, r5, r10 /* *(d+offset) = t1 */
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addi r4, r4,-4 /* n-- */
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bneid r4, a_word_aligned /* loop */
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addi r10, r10, 4 /* offset++ (IN DELAY SLOT) */
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bri a_word_done
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a_word_unaligned:
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andi r8, r6, 0xfffffffc /* as = s & ~3 */
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lwi r11, r8, 0 /* h = *(as + 0) */
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addi r8, r8, 4 /* as = as + 4 */
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addi r9, r9, -1
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beqi r9, a_word_u1 /* t1 was 1 => 1 byte offset */
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addi r9, r9, -1
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beqi r9, a_word_u2 /* t1 was 2 => 2 byte offset */
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a_word_u3:
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bslli r11, r11, 24 /* h = h << 24 */
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a_wu3_loop:
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lw r12, r8, r10 /* v = *(as + offset) */
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bsrli r9, r12, 8 /* t1 = v >> 8 */
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or r9, r11, r9 /* t1 = h | t1 */
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sw r9, r5, r10 /* *(d + offset) = t1 */
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bslli r11, r12, 24 /* h = v << 24 */
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addi r4, r4,-4 /* n = n - 4 */
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bneid r4, a_wu3_loop /* while (n) loop */
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addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
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bri a_word_done
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a_word_u1:
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bslli r11, r11, 8 /* h = h << 8 */
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a_wu1_loop:
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lw r12, r8, r10 /* v = *(as + offset) */
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bsrli r9, r12, 24 /* t1 = v >> 24 */
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or r9, r11, r9 /* t1 = h | t1 */
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sw r9, r5, r10 /* *(d + offset) = t1 */
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bslli r11, r12, 8 /* h = v << 8 */
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addi r4, r4,-4 /* n = n - 4 */
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bneid r4, a_wu1_loop /* while (n) loop */
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addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
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bri a_word_done
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a_word_u2:
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bslli r11, r11, 16 /* h = h << 16 */
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a_wu2_loop:
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lw r12, r8, r10 /* v = *(as + offset) */
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bsrli r9, r12, 16 /* t1 = v >> 16 */
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or r9, r11, r9 /* t1 = h | t1 */
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sw r9, r5, r10 /* *(d + offset) = t1 */
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bslli r11, r12, 16 /* h = v << 16 */
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addi r4, r4,-4 /* n = n - 4 */
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bneid r4, a_wu2_loop /* while (n) loop */
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addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
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a_word_done:
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add r5, r5, r10 /* d = d + offset */
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add r6, r6, r10 /* s = s + offset */
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rsub r7, r10, r7 /* c = c - offset */
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a_xfer_end:
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a_xfer_end_loop:
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beqi r7, a_done /* while (c) */
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lbui r9, r6, 0 /* t1 = *s */
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addi r6, r6, 1 /* s++ */
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sbi r9, r5, 0 /* *d = t1 */
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addi r7, r7, -1 /* c-- */
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brid a_xfer_end_loop /* loop */
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addi r5, r5, 1 /* d++ (IN DELAY SLOT) */
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a_done:
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rtsd r15, 8
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nop
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.end memcpy
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/*----------------------------------------------------------------------------*/
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.globl memmove
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.ent memmove
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memmove:
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cmpu r4, r5, r6 /* n = s - d */
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bgei r4,fast_memcpy_ascending
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fast_memcpy_descending:
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/* move d to return register as value of function */
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addi r3, r5, 0
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add r5, r5, r7 /* d = d + c */
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add r6, r6, r7 /* s = s + c */
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addi r4, r0, 4 /* n = 4 */
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cmpu r4, r4, r7 /* n = c - n (unsigned) */
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blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
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/* transfer first 0~3 bytes to get aligned dest address */
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andi r4, r5, 3 /* n = d & 3 */
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/* if zero, destination already aligned */
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beqi r4,d_dalign_done
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rsub r7, r4, r7 /* c = c - n adjust c */
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d_xfer_first_loop:
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/* if no bytes left to transfer, transfer the bulk */
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beqi r4,d_dalign_done
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addi r6, r6, -1 /* s-- */
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addi r5, r5, -1 /* d-- */
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lbui r11, r6, 0 /* h = *s */
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sbi r11, r5, 0 /* *d = h */
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brid d_xfer_first_loop /* loop */
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addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
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d_dalign_done:
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|
addi r4, r0, 32 /* n = 32 */
|
|
cmpu r4, r4, r7 /* n = c - n (unsigned) */
|
|
/* if n < 0, less than one block to transfer */
|
|
blti r4, d_block_done
|
|
|
|
d_block_xfer:
|
|
andi r4, r7, 0xffffffe0 /* n = c & ~31 */
|
|
rsub r7, r4, r7 /* c = c - n */
|
|
|
|
andi r9, r6, 3 /* t1 = s & 3 */
|
|
/* if temp != 0, unaligned transfers needed */
|
|
bnei r9, d_block_unaligned
|
|
|
|
d_block_aligned:
|
|
addi r6, r6, -32 /* s = s - 32 */
|
|
addi r5, r5, -32 /* d = d - 32 */
|
|
lwi r9, r6, 28 /* t1 = *(s + 28) */
|
|
lwi r10, r6, 24 /* t2 = *(s + 24) */
|
|
lwi r11, r6, 20 /* t3 = *(s + 20) */
|
|
lwi r12, r6, 16 /* t4 = *(s + 16) */
|
|
swi r9, r5, 28 /* *(d + 28) = t1 */
|
|
swi r10, r5, 24 /* *(d + 24) = t2 */
|
|
swi r11, r5, 20 /* *(d + 20) = t3 */
|
|
swi r12, r5, 16 /* *(d + 16) = t4 */
|
|
lwi r9, r6, 12 /* t1 = *(s + 12) */
|
|
lwi r10, r6, 8 /* t2 = *(s + 8) */
|
|
lwi r11, r6, 4 /* t3 = *(s + 4) */
|
|
lwi r12, r6, 0 /* t4 = *(s + 0) */
|
|
swi r9, r5, 12 /* *(d + 12) = t1 */
|
|
swi r10, r5, 8 /* *(d + 8) = t2 */
|
|
swi r11, r5, 4 /* *(d + 4) = t3 */
|
|
addi r4, r4, -32 /* n = n - 32 */
|
|
bneid r4, d_block_aligned /* while (n) loop */
|
|
swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */
|
|
bri d_block_done
|
|
|
|
d_block_unaligned:
|
|
andi r8, r6, 0xfffffffc /* as = s & ~3 */
|
|
rsub r6, r4, r6 /* s = s - n */
|
|
lwi r11, r8, 0 /* h = *(as + 0) */
|
|
|
|
addi r9, r9, -1
|
|
beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */
|
|
addi r9, r9, -1
|
|
beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */
|
|
|
|
d_block_u3:
|
|
bsrli r11, r11, 8 /* h = h >> 8 */
|
|
d_bu3_loop:
|
|
addi r8, r8, -32 /* as = as - 32 */
|
|
addi r5, r5, -32 /* d = d - 32 */
|
|
lwi r12, r8, 28 /* v = *(as + 28) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 28 /* *(d + 28) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 24 /* v = *(as + 24) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 24 /* *(d + 24) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 20 /* v = *(as + 20) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 20 /* *(d + 20) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 16 /* v = *(as + 16) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 16 /* *(d + 16) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 12 /* v = *(as + 12) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 12 /* *(d + 112) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 8 /* v = *(as + 8) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 8 /* *(d + 8) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 4 /* v = *(as + 4) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 4 /* *(d + 4) = t1 */
|
|
bsrli r11, r12, 8 /* h = v >> 8 */
|
|
lwi r12, r8, 0 /* v = *(as + 0) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 0 /* *(d + 0) = t1 */
|
|
addi r4, r4, -32 /* n = n - 32 */
|
|
bneid r4, d_bu3_loop /* while (n) loop */
|
|
bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
|
|
bri d_block_done
|
|
|
|
d_block_u1:
|
|
bsrli r11, r11, 24 /* h = h >> 24 */
|
|
d_bu1_loop:
|
|
addi r8, r8, -32 /* as = as - 32 */
|
|
addi r5, r5, -32 /* d = d - 32 */
|
|
lwi r12, r8, 28 /* v = *(as + 28) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 28 /* *(d + 28) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 24 /* v = *(as + 24) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 24 /* *(d + 24) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 20 /* v = *(as + 20) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 20 /* *(d + 20) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 16 /* v = *(as + 16) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 16 /* *(d + 16) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 12 /* v = *(as + 12) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 12 /* *(d + 112) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 8 /* v = *(as + 8) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 8 /* *(d + 8) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 4 /* v = *(as + 4) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 4 /* *(d + 4) = t1 */
|
|
bsrli r11, r12, 24 /* h = v >> 24 */
|
|
lwi r12, r8, 0 /* v = *(as + 0) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 0 /* *(d + 0) = t1 */
|
|
addi r4, r4, -32 /* n = n - 32 */
|
|
bneid r4, d_bu1_loop /* while (n) loop */
|
|
bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
|
|
bri d_block_done
|
|
|
|
d_block_u2:
|
|
bsrli r11, r11, 16 /* h = h >> 16 */
|
|
d_bu2_loop:
|
|
addi r8, r8, -32 /* as = as - 32 */
|
|
addi r5, r5, -32 /* d = d - 32 */
|
|
lwi r12, r8, 28 /* v = *(as + 28) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 28 /* *(d + 28) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 24 /* v = *(as + 24) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 24 /* *(d + 24) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 20 /* v = *(as + 20) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 20 /* *(d + 20) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 16 /* v = *(as + 16) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 16 /* *(d + 16) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 12 /* v = *(as + 12) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 12 /* *(d + 112) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 8 /* v = *(as + 8) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 8 /* *(d + 8) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 4 /* v = *(as + 4) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 4 /* *(d + 4) = t1 */
|
|
bsrli r11, r12, 16 /* h = v >> 16 */
|
|
lwi r12, r8, 0 /* v = *(as + 0) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
swi r9, r5, 0 /* *(d + 0) = t1 */
|
|
addi r4, r4, -32 /* n = n - 32 */
|
|
bneid r4, d_bu2_loop /* while (n) loop */
|
|
bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
|
|
|
|
d_block_done:
|
|
addi r4, r0, 4 /* n = 4 */
|
|
cmpu r4, r4, r7 /* n = c - n (unsigned) */
|
|
blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
|
|
|
|
d_word_xfer:
|
|
andi r4, r7, 0xfffffffc /* n = c & ~3 */
|
|
rsub r5, r4, r5 /* d = d - n */
|
|
rsub r6, r4, r6 /* s = s - n */
|
|
rsub r7, r4, r7 /* c = c - n */
|
|
|
|
andi r9, r6, 3 /* t1 = s & 3 */
|
|
/* if temp != 0, unaligned transfers needed */
|
|
bnei r9, d_word_unaligned
|
|
|
|
d_word_aligned:
|
|
addi r4, r4,-4 /* n-- */
|
|
lw r9, r6, r4 /* t1 = *(s+n) */
|
|
bneid r4, d_word_aligned /* loop */
|
|
sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */
|
|
|
|
bri d_word_done
|
|
|
|
d_word_unaligned:
|
|
andi r8, r6, 0xfffffffc /* as = s & ~3 */
|
|
lw r11, r8, r4 /* h = *(as + n) */
|
|
|
|
addi r9, r9, -1
|
|
beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */
|
|
addi r9, r9, -1
|
|
beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */
|
|
|
|
d_word_u3:
|
|
bsrli r11, r11, 8 /* h = h >> 8 */
|
|
d_wu3_loop:
|
|
addi r4, r4,-4 /* n = n - 4 */
|
|
lw r12, r8, r4 /* v = *(as + n) */
|
|
bslli r9, r12, 24 /* t1 = v << 24 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
sw r9, r5, r4 /* *(d + n) = t1 */
|
|
bneid r4, d_wu3_loop /* while (n) loop */
|
|
bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
|
|
|
|
bri d_word_done
|
|
|
|
d_word_u1:
|
|
bsrli r11, r11, 24 /* h = h >> 24 */
|
|
d_wu1_loop:
|
|
addi r4, r4,-4 /* n = n - 4 */
|
|
lw r12, r8, r4 /* v = *(as + n) */
|
|
bslli r9, r12, 8 /* t1 = v << 8 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
sw r9, r5, r4 /* *(d + n) = t1 */
|
|
bneid r4, d_wu1_loop /* while (n) loop */
|
|
bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
|
|
|
|
bri d_word_done
|
|
|
|
d_word_u2:
|
|
bsrli r11, r11, 16 /* h = h >> 16 */
|
|
d_wu2_loop:
|
|
addi r4, r4,-4 /* n = n - 4 */
|
|
lw r12, r8, r4 /* v = *(as + n) */
|
|
bslli r9, r12, 16 /* t1 = v << 16 */
|
|
or r9, r11, r9 /* t1 = h | t1 */
|
|
sw r9, r5, r4 /* *(d + n) = t1 */
|
|
bneid r4, d_wu2_loop /* while (n) loop */
|
|
bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
|
|
|
|
d_word_done:
|
|
|
|
d_xfer_end:
|
|
d_xfer_end_loop:
|
|
beqi r7, a_done /* while (c) */
|
|
addi r6, r6, -1 /* s-- */
|
|
lbui r9, r6, 0 /* t1 = *s */
|
|
addi r5, r5, -1 /* d-- */
|
|
sbi r9, r5, 0 /* *d = t1 */
|
|
brid d_xfer_end_loop /* loop */
|
|
addi r7, r7, -1 /* c-- (IN DELAY SLOT) */
|
|
|
|
d_done:
|
|
rtsd r15, 8
|
|
nop
|
|
|
|
.end memmove
|